Title Frost flower chemical signature in winter snow on Vestfonna ice cap, Nordaustlandet, Svalbard
Author Beaudon, E.; Moore, J.C.
Author Affil Beaudon, E., University of Lapland, Arctic Centre, Rovaniemi, Finland
Source The Cryosphere (Online), 3(2), p.147- 154, . Publisher: Copernicus on behalf of the European Geosciences Union, Katlenburg- Lindau, International. ISSN: 1994- 0424
Publication Date 2009
Notes In English. Published in The Cryosphere Discussion: 2 February 2009, http://www.the-cryosphere- discuss.net/3/159/2009/tcd-3-159-2009.html; doi:10.5194/tc-3-147-2009, accessed in May, 2010. 31 refs. CRREL Acc. No: 64005573
Index Terms aerosols; crystals; human activity; ice; ice crystals; ions; meteorology; snow; Spitsbergen--Nordaustlandet; Arctic region; frost flowers; Hinlopen Strait; ice caps; International Polar Year 2007-08; IPY 2007-08 Research Publications; Lady Franklinfjorden; Nordaustlandet; paleoenvironment; sea ice; sea water; Spitsbergen; sulfates; Svalbard; Vestfonna ice cap
Abstract The chemistry of snow and ice cores from Svalbard is influenced by variations in local sea ice margin and distance to open water. Snow pits sampled at two summits of Vestfonna ice cap (Nordaustlandet, Svalbard), exhibit spatially heterogeneous soluble ions concentrations despite similar accumulation rates, reflecting the importance of small- scale weather patterns on this island ice cap. The snow pack on the western summit shows higher average values of marine ions and a winter snow layer that is relatively depleted in sulphate. One part of the winter snow pack exhibits a [SO42-/Na+] ratio reduced by two thirds compared with its ratio in sea water. This low sulphate content in winter snow is interpreted as the signature of frost flowers, which are formed on young sea ice when offshore winds predominate. Frost flowers have been described as the dominant source of sea salt to aerosol and precipitation in ice cores in coastal Antarctica but this is the first time their chemical signal has been described in the Arctic. The eastern summit does not show any frost flower signature and we interpret the unusually dynamic ice transport and rapid formation of thin ice on the Hinlopen Strait as the source of the frost flowers.
URL http://www.the-cryosphere.net/3/147/2009/tc-3-147-2009.pdf
Publication Type journal article
Record ID 301239